Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hung tuan du snippets" » "hung tran du snippets", "quang tuan du snippets", "trung tuan du snippets", "hung toan du snippets", "hung xuan du snippets", "hung tuan cu snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hung tuan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hung tuan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hung tuan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hung tuan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.